Brad Pitt has warned pal Ashton Kutcher off playing a practical joke on
Hollywood's most notorious prankster, George Clooney - because the movie
hunk will make his life a misery.

Pitt interviewed Kutcher for America's Interview magazine, and took the
opportunity to advise his young pal not to go after his Ocean's Eleven
partner for MTV prank show Punk'd..

Pitt says, "I remember two years ago you were after Clooney. I
would tell you as your friend: 'Don't do it. Don't ever go near it. He'll
kill you and everything you love.' I know it's tempting, but don't do
it."

Pitt was on the receiving end of one of Clooney's top pranks as payback
for convincing crew members on the set of Ocean's Twelve that Clooney
insists on staying in character and wanted to be called Danny Ocean
throughout the shoot.

In revenge, Clooney made Pitt drive through rush hour Hollywood traffic
with a sign suggesting he was lacking in manhood.

Their co-star Matt Damon explains, "Brad was about to drive off
and George came up to say goodbye. Brad was sitting in his car and George
kind of tapped the car with his hand and said, 'All right, take care.'

"When he pulled his hand away, he'd left a bumper sticker that
read 'Small Penis Onboard'. So Brad drove through rush-hour traffic in LA
with it, and all these people were looking at him and waving."